Sash frame



C. M. KINGHORN ,Nov, 27, 1951 SASH FRAME 4 Sheets-Sheet 1 Filed Jan. 29, 1947 INYENTOR CHARLES M.K l NGHORN Mmmw iffi ATTORNEY;

Nov. 27, 1951 c. M. KINGHORN 2,576,348

SASH FRAME Filed Jan. 29, 1947 4 Sheets-Sheet 2 INVEfl'FQR CHARLESJ'LKINGHORN Nov. 27, 19 1 c. M. KINGHORN SASH FRAME v 4 Sheets-Sheet 5 Filed Jan. 29, 1947 CHARM? 514.245 NFJHORN Nov. 27, 1951 c. M. KINGHORN, 2,576,348

SASH FRAME Filed Jan. 29, 1947 4 Sheets-Sheet 4 CHAQLESHHMGHORH f A'rmgimws Patented Nov. 27, i951 s SASH FRAME Charles M. Kinghorn, Montreal, Quebec, Canada, assignor to Cresswell Roll Forming Company Limited, Montreal, Quebec, Canada Application January 29, 1947, Serial No. 725,002

9 Claims. (01. -55) This invention relates to improvements in double glazed sash frames in which the outer glazin is permanently secured in the outer portion of a main sash frame and the inner glazing is carried by a supplementary frame which is removably fitted in a recess at the inner side of said main frame.

A particular object of this invention is to provide a supplementary sash frame construction comprising an inner and outer rail bar assembly adapted to be detachably fitted together in 'secured relation to form a glazing channel between the marginal portions of said rail bars along the inner sides thereof.

' A particular feature of the construction of this supplementary sash frame is that it readily permits separation of the inner and outer rail bar assembly to allow replacement of the glazing. Accordingly, the complete framework of the inner rail bar; which has been soldered or otherwise secured together at the corner portions, may be separated as a unit from the framework of the outer rail bar to permit the insertion of a new pane of glass. The inner framework may then be re-assembled with the outer framework to secure the glazing in place. This assembly has considerable advantages over the conventional single bar type of supplementary sash frames in which the inner glazing must be permanently secured, as any attempt to insert a new glass would result in the distortion of the glazing channel rail of the frame.

Another advantage of the present invention is that the interfitting relation of the inner and outer rail bar frames provides a greater strength to the assembly which tends to resist the stresses and shocks to which the supplementary sash frame is normally subjected to such as when the frame is swung open on its hinges from the main sash frame for cleaning purposes or when the main frame is closed with a sudden jolt.

A further object of this invention is to provide a hollow construction outer rail bar assembly, formed from a single strip of sheet metal, with a rolled joint at the seam edges. This rolled joint provides a marginal projection along the outer edge of the frame and not only greatly increases the strength of the outer rail bar but eliminates the tendency towards spreading along the seam edge.

Other objects, advantages and characteristic features of the invention will be more readily understood fromthe following detailed description taken in connection with the accompanying drawings, in which: a

Fig. 1 is an elevational view showing the'supplementary sash frame as it appears when hingedly secured to the main sash frame.

Fig. 2 is a sectional view in perspective of a corner portion of the main sash frame showing the assembled supplementary sash frame seated in the recess provided therefor.

Fig. 3 is an enlarged end view of the inner and outer rail bars in their assembledrelation.

Fig. 4 is a perspective view of a section of the main sash frame showing the manner in which the supplementary sash frame is secured to the main sash frame. I

'Fig. 5 is an exploded view of the assembly shown in Fig. 4.

Fig/Q is' an exploded view showing an outer rail bar corner reinforcing member in its relation to the corner of a pair of adjoining outer rail bars.

Fig. '7 is an exploded view showing an inner rail bar corner reinforcement member in its relation to the corners of a pair of adjoining inner rail bars.

Fig. 8 is an exploded view showing the adjoining corner fragments of the assembled inner and outerqrail bars with their corner reinforcement members as shown in Figs. 6 and '7.

. Referring more particularly to the drawings, 20 designates the main sash frame in which the outer glazing panel 2| is permanently secured in any suitable manner in a recess 22 provided therefor. .The inner side of frame 20 is provided with a recess 23 adapted to receive a supplementary sash frame 24 in which the inner glazing panel 25 is secured.

As shown in the accompanying drawings, the supplementary sash frame 24 comprises inner and outer rail bars 26 and 21.

The inner rail bar 26 is shaped at its outer marginalportion to provide a recess 28 adapted to receive a suitable packing or window sealing strip indicated at 29, said packing being held in placeby suitable anchoring prongs 30 preferably formed by stamping the outer surface of recess 28. The inner end of the rail bar is 'substantially C-shaped as indicated at 3| to provide an abutment panel engageable with the abutment wall 32 of frame recess 23. The marginal portion of panel 31 is inturned to provide a flange 33, the outer surface of which is adapted to engage the inner marginal surface of glazing panel 25 in supporting relation.

The outer rail bar 2'! is of hollow metal construction formed from a single strip of sheet metal. The outer end wall 34 is substantially fiat to engage the end supporting wall 35 of frame recess 23. The inner side wall 36 is shaped to receive inner rail bar 26 in nested relation so as to hold said inner rail bar in abutting engagement with the abutment wall 32 of frame recess 23 when the assembled supplementary sash frame 24 is fittdtlieriaifi: Accordingly: the sheetmetal? is folded back upon itself along th'e inner surface of outer end wall 34 to provide a tongue extension 3'! adapted to flank the outer marginal wall 38 of rail bar 26 so that the free end edge of tongue. extension 31 is engageable with said abutment wall 32. A recess 39 is formedia'djacentahrztongues extension 31 into which the recessed'zportion 28 of rail bar 26 is nested and a second tongue w is formed opposite the openlside of-lrceshapedi.

panel 3!, said tongue 40 extendin into the inner recess thereof. The inner end wall 4| of railbar 21 is formed as a continuation of that portion of thessheet whichzhasebeen-zfoldedQbackQu-pon itself toaprovideathentongueflfl and constitutesan abutsment wallcengageablewith the endedgeofeglazing;

7 curve? convexlysfromithermarginalisurface: indicatedriat-Afimfrom which ittextends-ito :meetthe; free seam edge of outer end wall-.3472 The .free: seamsedgesrfi 'ande46r ofi onter endi wall: 34-and side wall 44, respectively, are rolled togetherin interlocking: relation to formizacj oint 41 which overlies the innerzsurfacez-of-:frameIZ fl-lwherr the assembledsupplementary; frame. 24 is. fitted. therein.

Tina-inner rail lbare 2130 is provided .with spaced openings '48 registering withsimilanopenings 49 in-tthednner side wall 36 of -outer. raillban 21; Fastening elements 50, preferably metal fasteningscrews are inserted ..through.. said .openings..-48 and "49;. for. securing saidlraili bars together in. nestedflrelatiom.

The inner andfouter rail bars 26"and27 are separatelyput into. the desired lengths; according to. the dimensions ofthefr'amerequired; and their end edges mitred and .solde'redor otherwise suitably'secured 'tbgetl'ierito form separate inner andjouteri'rail' frames. As-shown in' Figs. 6, '7 and"8; the*rail bar'frames'26 and-2T may be pro vidd'with 'm'etal"reinforcing*'elements 5 l and 52, respectively; said-reinforcing "elements being inserted and brazed or otherwise-secured inplace prior t'o the abovementionedsoldering operation. Abcordingto-thepreferred embodiment ofthis invention, reinforcing element 5'l compri'ses a flat L -sHaped metal bar which is brazed tothe outer surface of" therailbars 26l the 1 intermediate section indicated at 53 between= recess 28 and G shaped abutmentpanel-1 3L Reinforcing 'ele-=- 52 comprises L -shaped ch'annel bar which issinserted betweerr the walls 'of thetubular rail'fib'ars fl and ib'razed.rtheretoz In assembling tlie supplementary sash frame 24,-?the2 'glazllig pa-nelal. 5: is; fitted :tofouter'zrail bar. frame flrsoathat the marginal end-:sedgles arein abutting; engagement-c with: inner: end i wall.v 4 L The sinnererail ibarrrframe 126i. is :thenznestedxinto the?v inner aside: wall; of frame: 21randrsecured thereto by fastening elements 50 Glazing-panel 25-tris thus securely. held-iintplace:between-ztheinturned-isupportinggflange :33 -.=.of .zframei 26;..which;

' bythe conventional frames.

.4 overlies end wall 4 I, and the marginal surface 43 of supporting side wall 42 in frame 21.

A particular feature to be noted in this arrangement of the glazing between the supporting flange 33 and the marginal surface 43 of the supporting wall 42 is that both the flange and the marginal surface sections are so constructed as to: exerti-"a resilient pressurezconta'ct against the inner and outer surfacesbfithe glazingpanel instead of the more rigid types of support afforded Such a resilient pressure is intended to reduce the tendency towardbreakage of the glazing in the more rigid typeszofisupporta. Theipressure of the supporting members againstiithe inner and outer marginal surfaces 'of theglazing panel is constantly maintained-and is..sufficient to prevent a loose fitting orrattling of the panel in the frame. Thus it will be seen that the usual cementing of the panel in the glazing channel may readily be dispensed with;

ASnShOWlfl .irr:Figs.1;4+and 5,-.the assembledisup plementary;sashrzframe ZM-is .fittedito.v the main; saslrframe-2ii-.-so that the sealing strip 29: and .the

abutment-panel of innerrail-frame. 2B are;in..

pressurei-contactt with iabutment wall 32i.-o..ree cess 23 and the outer end wall 34 of.-.oute xrailframed?) is disposed adj acenttheend supporting wall-35ofsaid recess. The. -frame.24--is-.then secured-300i frame zit-by suitabl-y spaced securing. means generally "indicated; at .54 which? forcewfit. the frame. 24-against Yabutment. wall .32 toprovide. :LrPI'OFIBI: seatingg of. the-sealing, strips-29.. The. tongue extension 31 of end wall 34-engaging-abutment: wall :32 :prevents undue distortion or flattening. out of the a sealing. strip. In addition,v the. ceshapedaabutment panel .31 iof innerrrail frame 25.--is .apressed against abutment wall 32 and .in. turnexerts afurther-pressure on flange '33lagainst theinner. marginal-surface of glazingpanel .25..- The securingmeans/54 may; be of any suitable. form'r-which will-.forcefitthe supplementary sash frame; 24 to the abutment :Wall. 32iof recess 23.' In: the-:presentinstance. (Fig...5)" I have shown boltsr- 55i-extendingathrough registering: openings 56vand. 55a: in the-.inneriand.outerzrail frames Hand :21 and. threaded into. retainingelements 5 which are-inserted in recesses 58in abutment wall :32" and-@securedto: said abutment wall by, retairnng screws 59...

The-said; securing means .'may.- extend :around. the four sides of the framework or, as shown'in Fig-.;?.1;. the supplementary sash;frame 24 may. be hingedito :the main sashs-frame :20.-by.-any suitable. hinge connections generally-indicatedat 60, and. theesecuring means. spaced around .the remaining three sides...

Fromtherforegoing it willreadily beseen that a abroken glazing. panel-zmay. easily be; replaced withoutzdistortion-or damage :to the supplementary sash framesrails. The inner. rail frame 26 iseseparatedfrom .outerxrail frame-21= by. the removal of I screws =50-and a. .new1glazing panel is inserted; Theinner. andyouterzrail; frames are then reassembled in nested relationand. the resultingg sash' frame fitted? to: I the.- main* sash frame.- Where the. supplementary," sash frame is hinged to-the main frame it is "only necessary to swing-git open :on its hinges will order to sepae rate the inner and outer rail frames.

Theerolled joint 41 ofathe eouten-rail framep2l is zsointerlocked that anyyshock' or strain,:.due e rrin or i proper; hanging. of. i the supplementarygframe, such as stressmhile swingingorr its hinges, will not distort orrspread-zithe joint.

It will be seen that any force or strain applied will cause the seam edges 45 and 46 to grip one against the other in resistance of any such force or strain.

Having thus described the preferred embodiment of this invention it will be understood that various modifications may be resorted to within the scope and spirit of the invention as defined by the appended claims.

I claim:

1. In a sash assembly comprising a main sash frame recessed about the inner marginal portion and a supplementary sash frame fittedin said recess, said supplementary sash frame comprising a hollow outer frame member recessed about its inner marginal portion to receive a glazing panel and an inner frame member provided with a flange projection at its inner marginal portion, said inner and outer frame members being detachably fitted together to provide a glazing channel between the recessed portion of said outer member and the flange of said inner member with said inner frame member having its flange projection butted against one wall of the main sash recess so that when the assembled supplementary sash frame is secured in the recess of the main sash frame pressure i applied to the inner frame member to cause said flange to bear against the glazing panel.

2. In a sash frame assembly of the kind described a glazing retaining sash frame fitted in a main sash frame comprising a hollow frame member formed from a single strip of sheet metal shaped to provide a glazing panel recess along the inner marginal surface thereof and a second recess along an adjacent side wall, a glazing panel and a second frame member recessed along one side thereof to receive a sealing strip and provided with an inturned flanged marginal portion, said frame members being detachably secured together with the sealing strip recess of said second frame member disposed in interfitting relation with the second mentioned recess of said hollow frame member and the flanged marginal portion disposed in opposing relation to the glazing panel recess to form a glazing channel to retain said glazing panel in secured relation.

3. In a sash assembly comprising a main sash frame recessed about its inner marginal surface and a glazing frame fitted in the recess of said main sash frame, said glazing frame comprising a hollow outer frame member formed from a single strip of sheet metal shaped to provide a glazing panel recess along the inner marginal surface thereof, a second recess along an adjacent side wall and a flat outer end wall engaging the main sash recess in supporting relation, a glazing panel and a second inner frame member recessed along one side thereof to receive a sealing strip and provided with an inturned flanged marginal portion, said outer and inner frame members being detachably secured together with the sealing strip recess of said second frame member disposed in interfitting relation with the second mentioned recess of the hollow frame member and the flanged marginal portion disposed in opposing relation to the glazing panel recess to form a glazing channel to retain said glazing panel in secured relation.

4. In a sash assembly as set forth in claim 3, said second frame member being provided with a panel member adjacent the inturned flanged marginal portion, saidpanel member engaging one wall of the main sash recess and serving to support the inturned flanged portion against said glazing panel in retaining engagement.

5. In a sash assembly as set forth in claim 3, said second frame member being provided with gripping means to retain the sealing strip in the recessed portion thereof.

6. In a sash assembly as set forth in claim 3, said hollow frame member being provided with an extension member along the inner marginal portion of the outer end wall, said extension engaging the surface of the main sash recess in abutting engagement to prevent undue distortion of the sealing strip.

7. In a sash assembly as set forth in claim 3, said glazing panel recess comprising an abutment wall supporting the end edge of said glazing panel and a side supporting wall arranged with respect to said abutment wall so that the marginal surface remote from said abutment wall will be in pressure contact with the marginal surface of the glazing panel in supporting relation thereto.

8. In a sash assembly as set forth in claim 3, said hollow frame member being provided with a rolled joint at the seam edges thereof.

9. In a sashassembly as set forth in claim 3, the seam edges of said hollow member being rolled in interlocking relation to provide a flange extension along the inner marginal surface of F said main sash frame.

CHARLES M. KINGHORN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 934,530 Holzer Sept. 21, 1909 2,004,727 Keller June 11,1935 2,093,727 Julien Sept. 21,1937 2,266,973 Horton Dec. 23,1941 2,320,069 Cresswell et a1. May 25, 1943 

